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Two values are provided for the dimensions of the initial orbit. For telescopes in Earth orbit, the minimum and maximum altitude are given in kilometers. For telescopes in solar orbit, the minimum distance and the maximum distance between the telescope and the center of mass of the Sun are given in astronomical units (AU).
Telescope History Archived 2021-02-14 at the Wayback Machine, NASA Official Website, accessed 02/09/2019; History of the Telescope, accessed 02/09/2019; List of astronomical observatories and telescopes, Encyclopedia Britannica, 02/09/2019
List of largest optical reflecting telescopes – List of large optical telescopes; List of largest optical refracting telescopes; List of space telescopes; List of solar telescopes; List of telescope types; List of largest optical telescopes historically; List of largest optical telescopes in the 20th century
List of largest optical telescopes historically; List of largest optical telescopes in the 19th century; List of largest optical telescopes in the 20th century; List of the largest optical telescopes in North America; List of largest optical telescopes in the 18th century; List of largest optical telescopes in the British Isles; List of ...
The list includes both single dishes and interferometric arrays. The list is sorted by region, then by name; unnamed telescopes are in reverse size order at the end of the list. The first radio telescope was invented in 1932, when Karl Jansky at Bell Telephone Laboratories observed radiation coming from the Milky Way.
Hubble Space Telescope: 24 April 1990 Orbital space telescope (operational since 1990 [needs update]) [298] [299] [300] Ulysses: 6 October 1990 Solar polar orbiter [301] [302] [303] Yohkoh (Solar-A) 30 August 1991 Solar observations (1991–2001) [304] [305] Mars Observer: 25 September 1992 Attempted Mars orbiter (contact lost) [306] [307 ...
Pages in category "Space telescopes" The following 190 pages are in this category, out of 190 total. This list may not reflect recent changes. ...
This list of the largest optical reflecting telescopes with objective diameters of 3.0 metres (120 in) or greater is sorted by aperture, which is a measure of the light-gathering power and resolution of a reflecting telescope. The mirrors themselves can be larger than the aperture, and some telescopes may use aperture synthesis through ...